11-29-2001
We're really not supposed to help folks with homework assignments on this board. But you've done most of the work and you're stuck on a very tricky problem.
if [ -n $x ]
will not work, If there is nothing in x the command becomes:
if [ -n ]
So you need to use
if [ -n "$x" ]
Now when threre's nothing in x, the command becomes
if [ -n "" ]
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IE(4) BSD/i386 Kernel Interfaces Manual IE(4)
NAME
ie -- Ethernet device driver
SYNOPSIS
To compile this driver into the kernel, place the following line in your kernel configuration file:
device ie
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
if_ie_load="YES"
In /boot/device.hints:
hint.ie.0.at="isa"
hint.ie.0.port="0x300"
hint.ie.0.irq="5"
hint.ie.0.maddr="0xd0000"
HARDWARE
The ie driver provides supports the following 8 and 16bit ISA Ethernet cards that are based on the Intel i82586 chip:
o 3COM 3C507
o AT&T EN100
o AT&T Starlan 10
o AT&T Starlan Fiber
o Intel EtherExpress 16
o RACAL Interlan NI5210
DIAGNOSTICS
ie%d: unknown board type code %d An i82586 chip was found, but the driver was unable to determine the actual board type during the probe.
ie%d: kernel configured maddr %x doesn't match board configured maddr %x The device probe detected a different maddr than the one specified
in the kernel configuration file.
ie%d: can't find shared memory The device probe could not access the shared memory to determine its size.
ie%d: kernel configured msize %d doesn't match board configured msize %d The device probe found a different size for the shared memory than
the one specified in the kernel configuration file.
ie%d: kernel configured irq %d doesn't match board configured irq %d The device probe detected that the board is configured for a different
interrupt than the one specified in the kernel configuration file.
ie%d: reset The Intel i82586 had to be reset by the driver.
ie%d: transceiver problem The driver has detected a problem with the Ethernet transceiver. This is usually due to a loose or broken trans-
ceiver cable when using an external transceiver. When you experience this problem with an on-card transceiver your card may be incorrectly
jumpered for to use an external transceiver. Worst case your on-board transceiver may be broken.
ie%d: TDR detected an open %d clocks away The driver detected an open circuit in the Ethernet cable. Check your coax cable and terminator
resistors.
ie%d: TDR detected a short %d clocks away The driver detected a short circuit in the Ethernet cable. Check your coax cable and terminator
resistors.
ie%d: TDR returned unknown status %x The driver got an unknown status from the card during the Ethernet cable test.
ie%d: multicast address setup command failed The card could not be put into multicast mode.
ie%d: configure command failed The card refused to respond correctly during configuration.
ie%d: individual address setup command failed The programming of the Ethernet (MAC) address failed.
CAVEATS
The Racal Interlan NI5210 comes in variants with 8 and 16 kbytes of shared memory. It is strongly advisable to use the 16 kbyte variant.
You can upgrade your 8 kbyte card to 16 kbyte by adding an additional RAM chip.
SEE ALSO
arp(4), netintro(4), ng_ether(4), ifconfig(8)
AUTHORS
The ie device driver was written by Garrett A. Wollman, based on code by William F. Jolitz and Lawrence Berkeley Laboratories. 3C507 support
was written by Charles M. Hannum. This manual page was written by Wilko C. Bulte.
BSD
July 16, 2005 BSD